Portable lamp



FIG. 1 is a top, front, right side perspective view of a portable lamp showing my new design;

FIG. 2 is a bottom, right side perspective view thereof;

FIG. 3 is an exploded top, front perspective view thereof;

FIG. 4 is a top plan thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a front elevational view thereof;

FIG. 7 is a right side elevational view thereof;

FIG. 8 is rear elevational view thereof;

FIG. 9 is a left side elevational view thereof. 

The ornamental design for a portable lamp, as shown. 